Apparatus for forming agricultural drip tape

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6920907
APP PUB NO 20030106633A1
SERIAL NO

10318028

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A process for forming irrigation drip tape includes, broadly, the steps of a) supplying a longitudinally continuous strip of flexible plastic material in a first direction; b) heating a narrow band of the strip along a longitudinal axis thereof; c) depositing a continuous bead of material on an upper surface of the strip, along the narrow band, while the strip moves in the one direction; d) cooling the strip and the bead; e) folding the strip longitudinally so that the longitudinal edges overlap; and f) sealing said longitudinal edges to form a tubular drip tape with a longitudinal, overlapped seam, with the bead extending parallel to the seam and in opposed, facing relationship thereto. Apparatus for carrying out the process includes a first supply station adapted to supply a continuous length of flexible material; a second station including a trimmer roll and a pair of associated knife blades arranged to trim opposite longitudinal edges of the material to form a strip of predetermined width: a third station including a slitter wheel arranged to cut axially spaced longitudinal slits in the strip; a fourth station for applying a pre-formed bead of material onto a surface of the strip, the bead having one or more secondary flow paths formed therein; and a fifth station including a plurality of rollers arranged to wrap the strip about a mandrel into tubular form; a nozzle arranged to apply an adhesive bead along one of the longitudinal edges of the strip; and at least one pressure roller for applying pressure along the longitudinal edge to form a bonded seam between the longitudinal edges of the strip.

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First Claim

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Family

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NELSON IRRIGATION CORPORATIONWALLA WALLA, WA76

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bren, Jr Theodore J Walla Walla, WA 3 35
Harrold, Charles R Walla Walla, WA 7 65

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (5)
4473191 Drip irrigation system employing flow regulation 44 1982
4430020 Drip irrigation hose 30 1982
4642152 Drip irrigation system employing flow regulation 29 1984
4749535 Method and apparatus for forming profiled plastic products involving extrusion, roller shaping and cutting 10 1986
5181532 Flow control 12 1992
 
HUNTLEY, MARK, CO-TRUSTEES OF THE DAVIES ALLPORT TRUST (2)
4984739 Drip irrigation hose 32 1988
5123984 Method and apparatus for forming ports in drip irrigation hose 34 1990
 
Drip Irrigation Systems, Ltd. (1)
5324379 Method and apparatus for producing drip irrigation conduit 21 1993
 
Hydromatic Ltd. (1)
5282916 Method and apparatus for making drip irrigation devices 24 1992
 
Micro Irrigation Technologies, Inc. (1)
5688072 Agricultural drip tape 8 1995
 
U.S. FARM PRODUCTS LIMITED (1)
4874132 Drip irrigation apparatus 22 1983
 
Hydroplan Engineering Ltd. (4)
5022940 Process of making a drip irrigation conduit 61 1989
5122044 Apparatus for making a drip irrigation conduit 18 1990
5207386 Flow emitter units moulds for use in the manufacture thereof 24 1991
5324371 Process for producing a drip irrigation conduit 30 1993
 
Seisan Nippon Sha, Ltd. (1)
4555282 Method of and means for bonding synthetic resin profiled fasteners to film substrate 69 1983
 
The Toro Company (1)
4880167 Irrigation hose with linear turbulent flow emitter 30 1988
 
T-SYSTEMS INTERNATIONAL, INC. (6)
5282578 Self-protecting irrigation hose and method 28 1993
5333793 Drip irrigation hose with pressure compensation and method for its manufacture 22 1993
5458712 Process for forming drip irrigation hose with pressure compensation 12 1994
5522551 Drip irrigation hose and method for its manufacture 25 1994
5634595 Drip irrigation hose and method for its manufacture 12 1996
5722601 Drip irrigation hose and method of its manufacture 17 1996
 
ROBERTS IRRIGATION PRODUCTS, INC. (4)
4722759 Apparatus for fabricating drip irrigation tape 33 1985
5246171 Drip irrigation tape including a series of alternately offset elongated chambers 19 1992
5318657 Drip irrigation tape and method of manufacture 22 1993
5387307 Drip irrigation tape and method of manufacture 11 1994
 
MONSANTO COMPANY (1)
4323533 Rotary forming of articles 30 1980
 
Agrifim Irrigation International N.V. (1)
4702787 Process for making drip irrigation lines 19 1983
 
NAAN IRRIGATION SYSTEMS (1)
5271786 Method and apparatus for producing pipes for drip irrigation 31 1991
 
Townsend Controls Pty. Ltd. (1)
5076498 Irrigation tape and method of producing same 8 1989
 
WEAVER, DAVID R. (1)
5376203 Rotary molding apparatus and method 9 1993
 
CURWOOD, INC. (1)
4944442 Web retention and advancement mechanism 5 1988
 
PLASTRO IRRIGATION SYSTEMS LTD. (2)
5163622 Drip irrigation line and method of making same 26 1990
5203503 Drip irrigation lines 32 1991
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
RAIN BIRD CORPORATION (5)
9877440 Elastomeric emitter and methods relating to same 0 2013
D811179 Emitter part 0 2014
9883640 Methods and apparatus for transporting elastomeric emitters and/or manufacturing drip lines 0 2014
9877442 Drip line and emitter and methods relating to same 0 2016
9877441 Elastomeric emitter and methods relating to same 0 2016
* Cited By Examiner